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arXiv:1401.4571

Quantum discord and one-norm geometric quantum discord for XXX Heisenberg spin chain under noisy channels

E. Faizi, H. Eftekhari

Published Jan 18, 2014• 0 citations

Abstract

Here, we compare the behavior of the quantum discord, 1-norm geometric quantum discord and concurrence under the effect of decoherence for XXX Heisenberg spin chain. Their dependencies on temperature and coupling constant are presented in detail. By a comparison between them we can see that quantum discord and 1-norm geometric quantum discord are more robust than the concurrence against decoherence in the sense that quantum discord and 1-norm geometric quantum discord takes a nonzero value and decrease asymptotically, while the concurrence is zero in a large range of parameters including temperature and coupling constant. Moreover, we find that there is no simple relative ordering between 1-norm geometric quantum discord and quantum discord. This result contradicts the information which provided in some papers.

DOI: 10.48550/arxiv.1401.4571

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